| 单词 | roof bolting |
| 释义 | > as lemmasroof bolting roof bolting n. Mining the practice of using roof bolts; cf. rock bolting n. at rock n.1 Compounds 2a(a); roof bolts collectively. ΘΚΠ society > occupation and work > industry > mining > [noun] > other specific mining processes > in coal-mining outstroke1747 holing1841 coal-cutting1842 patio1845 sumping1849 bottoming1856 salting1856 patio process1862 spragging1865 yardage1877 booming1880 brushing1883 filling1883 sounding1883 yard-work1883 blanketing1884 goafing1888 freezing process1889 power loading1901 bashing1905 rock dusting1915 mucking1918 solid stowing1929 stone-dusting1930 roof bolting1949 rock bolting1955 1949 E. Thomas et al. Suspension Roof Support (U.S. Bureau Mines Information Circular No. 7533) 4 A pick man ordinarily trims the ribs and face..after the loading machine has completed its work and before the 'roof-bolting' crew enters. 1954 Jrnl. Chem., Metall. & Mining Soc. S. Afr. 54 285/1 It was necessary to resort to roof and side bolting and pig netting in order to protect the personnel. 1996 D. E. Garrett Potash iii. 217 All roads or permanent entries have roof bolting on a 1.4 x 1.4 m pattern, using 1.5 m long resin bolts. < as lemmas |
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